Study the chart and answer the questions below it.
In 2009 an additional £100,000 will be spent on exploration. If total annual expenditure increases by 8%, what proportion of overall expenditure will exploration account for?
Correct answer: B
Explanation If total expenditure increased by 8%, the new total expenditure = 1.08 x 4,000,000 = 4,320,000 Percentage spent on exploration in 2008 = 29% Proportion spent on eploration = (0.29 x 4320000) + 100000/4320000 = 0.3131 = 31.31%
What was the percentage decrease in the cost of mining from 2007 to 2008?
Correct answer: C
Explanation Cost of mining in 2007 = 0.19 x 3,400,000 = 646,000 Cost of mining in 2008 = 0.12 x 4,000,000 = 480,000 % decrease = (646,000 - 480,000)/646,000 = 25.7%
What was the percentage increase in the cost of exploration from 2007 to 2008?
Correct answer: A
Explanation Cost of exploration in 2007 = 0.2 x 3,400,000 = 680,000 Cost of exploration in 2008 = 0.29 x 4m = 1,160,000 % increase = (1,160,000 - 680,000)/680,000 x 100 = 71%
What was the total expenditure of mining and logistics in 2007?
Explanation Total 2007 expenditure = 3,400,000 Mining = 19% of 3,400,000 = 646,000 Logistics = 18% of 3,400,000 = 612,000 646,000 + 612,000 = 1,258,00
Study the table and answer the questions below it.
If 90% of cars in Argentina are owned by urban dwellers, what percentage of urban dwellers own cars (assuming a maximum of one car per person)?
Correct answer: D
Explanation Total number of vehicle cars = 1.1m Urban dwellers own (90/100) x 4.1m = 3.69m cars Ratio of urban to rural = 86.4 : 13.6 Total pop = 35.6 Urban dwellers = (86.4/100) x 35.6 = 30.76m % of urban dwellers with cars = (3.6m/30.76m) x 100 = 12%
